Reverse_given_number code added

Reverse_given_number/reverse_num.cpp

@@ -0,0 +1,41 @@
+#include <iostream>
+using namespace std;
+#include <cmath>
+int digits( int n){ int c=1;
+    for ( int i=1; 5; i++)
+    {
+       if (n/pow(10,i)<1)
+       {
+         break;  
+       }
+
+     else   c++;
+    }
+return c;
+}
+
+int main()
+{
+    int n;
+    cin >> n;
+   cout<<digits(n)<<"\n";
+
+    int rev = 0;
+    for (int i = digits(n); n>=1; i--)
+    {
+        int x = n % 10;
+        rev +=  x *(pow(10, i-1));
+        n = n / 10;
+    }
+    cout << rev;                                    /* 
+                                                    1234
+                                                    4
+                                                    4000
+                                                    123
+                                                    3
+                                                    4300
+                                                    4320
+                                                    */
+
+    return 0;
+}